I mean, it isn't just startups that do whiteboard coding interviews. In fact, if you want to check my comments on HN, I said pretty directly that I do not work

I mean, it isn't just startups that do whiteboard coding interviews. In fact, if you want to check my comments on HN, I said pretty directly that I do not work for a startup. Every single engineer who was or is employed at any big tech company has went through whiteboard interviews. If you are trying to imply that big tech companies cannot manage to attract experienced people, then I question the validity of that.